/Engine/Source/Runtime/Core/Public/Math/RotationMatrix.h
Builds a matrix with given X and Z axes. X will remain fixed, Z may be changed minimally to enforce orthogonality. Y will be computed. Inputs need not be normalized.
static [TMatrix](API\Runtime\Core\Math\TMatrix)< T > MakeFromXZ ( [TVector](API\Runtime\Core\Math\TVector)< T > const & XAxis, [TVector](API\Runtime\Core\Math\TVector)< T > const & ZAxis )